Concerts CALVERT CHRISTMAS CONCERT -- 7 p.m. today. Instrumental groups perform. Calvert High School, 600 Dares Beach Rd., Prince Frederick. Free. 401-535-7351 or 410-535-7330.

Dance AQUA SQUARE DANCING -- 7:30-9:30 p.m. every Friday. The Aqua Squares Square Dance Club of Calvert County holds a dance at the Southern Community Center, 20 Appeal Lane, Lusby. $5. 410-326-2676 or 301-373-2207.

Exhibits DOLL AND TRAIN EXHIBIT -- Noon-4 p.m. Wednesdays-Sundays, through Jan. 4. Head for the Little Red Schoolhouse on the museum's grounds for your fill of trains and dolls, or stroll through the museum proper for an abundance of teddy bears. An informative exhibit about President Theodore Roosevelt celebrates the teddy bear's 100th anniversary. Children will be offered a special treat if they can correctly guess the number of bears on display. St. Clement's Island-Potomac River Museum, 38370 Point Breeze Rd., Colton's Point. $1. 301-769-2222.

CHRISTMAS SHOW AND SMALL PACKAGES -- 11 a.m.-6 p.m. Wednesdays-Saturdays and 11 a.m.-3 p.m. Sundays, through Tuesday. The main gallery hosts the 16th annual Christmas All-Member Show, while the Mulberry Fields Room is devoted to works 8-by-10-inches or smaller. North End Gallery, 41625 Fenwick St., Leonardtown. Free. 301-475-3130 or www.northendgallery.org.

MAIN STREET GALLERY'S 11TH YEAR -- 11 a.m.-5 p.m. Wednesdays-Fridays; 11 a.m.-4 p.m. Saturday through Monday. "Spirit, Creativity and Surprise" features works by Parran Collery, Yvonne Creighton, Fanchon, Jerry Hovanec, Bo Jia, Diana Marta, Ruthann Uithol and others. Main Street Gallery, 486 Main St. Prince Frederick. Free. 410-535-3334.

20 YEARS OF CARMEN'S -- 10 a.m.-5 p.m. Tuesdays-Saturdays and 11 a.m.-3 p.m. Sundays, through Christmas. All gallery artists have been invited to submit one new work especially designed for this anniversary exhibition. Carmen's Gallery, Dowell Road, Solomons. Free. 410-326-2549 or www.carmensgallery.com.

CARLTON FLETCHER -- Noon-5 p.m. Mondays and Wednesdays; 3:30-7 p.m. Tuesdays, Thursdays and Fridays; and an hour before CSM performances, through Jan. 26. A retrospective of drawings and paintings by Carlton Fletcher. Tony Hungerford Memorial Gallery, College of Southern Maryland, 8730 Mitchell Rd., La Plata. Free. 301-934-7828, 301-870-3008 or 301-884-8131, Ext. 7828.

For Children KIDS 'N' CRITTERS -- 10 a.m. today. Children ages 3-5 can join a naturalist for a program about how some animals find their way around in the dark. Reservations are required. Battle Creek Cypress Swamp, Grays Road, Prince Frederick. $3; Battle Creek Nature Education Society members, $1. 410-535-5327, 800-735-2258 (TDD) or www.calvertparks.org.

Lectures and Literature BOOK CLUB SOUTHERN BRANCH -- 2 p.m. Saturday. Discuss either "Fallen Angel: A Novel" by Don Snyder (Christmas fiction) or "The Inn at the Edge of the World" by Alice Ellis (British fiction). Southern Branch Library, 20 Appeal Way, Lusby. Free. 410-326-5289.

Sports and Recreation WEEDING THE WOODS -- 8-11:30 a.m. third Saturday of month. Join a monthly effort to eradicate invasive alien plant species. Meet in the parking lot of Myrtle Point Park, Patuxent Boulevard, Myrtle Point. Free. billburruss@aol.com.

Theater PORT TOBACCO PLAYS -- 8 p.m. tomorrow; 3 p.m. Saturday and Sunday. Encore Kids and Encore Teens present "Forever Christmas" and "The Best Christmas Pageant Ever." Port Tobacco Players Theater, 508 Charles St., La Plata. $8. 301-932-6819.

Miscellaneous DRIVE-THROUGH DISPLAY -- 6-9 p.m. daily, through Jan. 1, weather permitting. Annmarie Garden's 13th annual Garden in Lights promises even more lights and a longer drive-through. The garden is festooned with floating sea nettles, sea horses, boats, flowers, a mermaid, ice skaters and lighted fountains, as well as twinkling trees along the drive. Annmarie Garden, Dowell Road, Solomons. Fridays, Saturdays and Sundays, $8 a car; other days, $5 a car. 410-326-4640 or www.annmariegarden.org.

WEEKLY AUCTIONS -- 6 p.m. Fridays. Chesapeake Auction House, 5015 St. Leonard Rd., St. Leonard. Free. 410-586-1161, 800-286-0033 or www.chesapeakeauctionhouse.com.

Plan Ahead

DINNER THEATER TRIP -- 11 a.m.-7:30 p.m. Jan. 26. Reserve tickets by Jan. 8 for a bus trip to Riverside Center in Fredericksburg to see "London of Charles Dickens" along with dinner, dessert and a drink. Bus picks up passengers in Hollywood, Waldorf and La Plata. $70. 301-884-8728, 240-925-0801 or 301-737-0620.

-- Carrie Donovan

The Southern Maryland Extra Entertainment Calendar lists events as space permits. Mail announcements and photos -- noting date, time, address, cost and phone number -- to Carrie Donovan, Southern Maryland Extra, The Washington Post, 1150 15th St. NW, Washington, D.C. 20071. You may also e-mail announcements to donovanc@washpost.com or fax them to 202-334-5417. Deadline is 14 days before publication.